DST Root CA X3 is processed as valid root certificate by everything but Oracle JDK. One may add it to trusted store using keytool, but it is not there by default. I am not sure if I should contact you or Oracle, but it would be nice to have it fixed.
According to the following post, ISRG has applied to the Oracle root program:
Root inclusion takes a long time; I don’t think I’ve seen an ETA anywhere.